Frontal Collision Detection
Table of contents
B1209 INFINITI Possible Causes
- Faulty Air Bag Diagnosis Sensor Unit (ACU)
- Air Bag Diagnosis Sensor Unit (ACU) harness is open or shorted
- Air Bag Diagnosis Sensor Unit (ACU) circuit poor electrical connection
How do I fix code B1209 INFINITI?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- After a front collision, all the deployed components and the Air Bag Diagnosis Sensor Unit (ACU) must need to be replaced. If there is no collision, then the problem is with the Air Bag Diagnosis Sensor Unit (ACU)
Cost of diagnosing the B1209 INFINITI code
The cost of diagnosing the B1209 INFINITI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Air Bag Warning Light ON
B1209 INFINITI Description
Detects component damage resulting from a front collision, blinks or illuminates the air bag warning lamp to
inform the driver. The air bag and seat belt pre-tensioners for driver and front seat passenger are operated by the decision of the Air Bag Diagnosis Sensor Unit (ACU) out signal transmitted because of the frontal collision.
The Frontal Collision Detection consists of crash zone sensor, Air Bag Diagnosis Sensor Unit (ACU), air bags and seat belt pre-tensioners for driver and front passenger.